A Swiss-made, solar-powered airplane called Solar Impulse completed an 18-hour flight from San Francisco to Phoenix on Saturday, marking the first leg of a fuel-free odyssey across America.

Adventurer Bertrand Piccard piloted the craft, which has the wingspan of a jumbo jet but the weight of a typical passenger car, to its landing at Phoenix's Sky Harbor International Airport at 12:30 a.m. MST (3:30 a.m. EDT).